Principles of Macroeconomics (MindTap Course List)
Principles of Macroeconomics (MindTap Course List)
7th Edition
ISBN: 9781285165912
Author: N. Gregory Mankiw
Publisher: Cengage Learning
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Chapter 9.2, Problem 2QQ
To determine

The impact of international trade on total surplus.

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Choose all correct answers regarding the estimated multiple linear regression model: ŷ = ߸ + ß‚× + ². Assume that ẞ, and ẞ are both non-zero. 0 1 (a) The estimated regression function is represented by a plane in three-dimensional space. (b) It gives the value of y, for each value of x, such that half the values of y are above the function and half are below. (c) The predicted value of y with x₁ = 1 and x2 = 1 is ẞ + Â₁ + Â₂ 0 (d) If you use robust option in Stata, then ẞ, becomes either smaller or larger in magnitude.
Determine whether the following statement is true or false. In a simple linear regression, y = ẞo + ẞ₁x+u, if E[ulx] = 0, the estimate of ẞ₁ is statistically significant. Explain your answer in two sentences or fewer.
-.5 y .5 0 Choose all the correct answers based on the figure below T T -2 0 2 4 X (a) The coefficient of x is not statistically significant (b) The explained sum of squares is less than the total sum of squares (c) The independent variable is a dummy variable (d) The assumption of homoskedasticity is not likely to hold
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